IT7869708A0 - RELAY PROTECTION DEVICE WITH THREE-PHASE RELEASE DUE TO UNDERVOLTAGE - Google Patents

RELAY PROTECTION DEVICE WITH THREE-PHASE RELEASE DUE TO UNDERVOLTAGE

Info

Publication number
IT7869708A0
IT7869708A0 IT7869708A IT6970878A IT7869708A0 IT 7869708 A0 IT7869708 A0 IT 7869708A0 IT 7869708 A IT7869708 A IT 7869708A IT 6970878 A IT6970878 A IT 6970878A IT 7869708 A0 IT7869708 A0 IT 7869708A0
Authority
IT
Italy
Prior art keywords
undervoltage
protection device
relay protection
release due
phase release
Prior art date
Application number
IT7869708A
Other languages
Italian (it)
Other versions
IT1160971B (en
Original Assignee
Asea Aktebolag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asea Aktebolag filed Critical Asea Aktebolag
Publication of IT7869708A0 publication Critical patent/IT7869708A0/en
Application granted granted Critical
Publication of IT1160971B publication Critical patent/IT1160971B/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
    • H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H02H7/265—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured making use of travelling wave theory

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Emergency Protection Circuit Devices (AREA)
IT69708/78A 1977-11-28 1978-11-27 RELAY PROTECTION DEVICE WITH THREE-PHASE RELEASE FOLLOWING UNDER VOLTAGE IT1160971B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7713409A SE409153B (en) 1977-11-28 1977-11-28 RELAY PROTECTION WITH THREE-PHASE RELEASE IN VOLTAGE

Publications (2)

Publication Number Publication Date
IT7869708A0 true IT7869708A0 (en) 1978-11-27
IT1160971B IT1160971B (en) 1987-03-11

Family

ID=20333009

Family Applications (1)

Application Number Title Priority Date Filing Date
IT69708/78A IT1160971B (en) 1977-11-28 1978-11-27 RELAY PROTECTION DEVICE WITH THREE-PHASE RELEASE FOLLOWING UNDER VOLTAGE

Country Status (8)

Country Link
US (1) US4254444A (en)
CA (1) CA1117585A (en)
CH (1) CH641917A5 (en)
DE (1) DE2850412A1 (en)
FR (1) FR2410386A1 (en)
GB (1) GB2011740B (en)
IT (1) IT1160971B (en)
SE (1) SE409153B (en)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4825323A (en) * 1987-11-12 1989-04-25 General Electric Company Out-of-step blocking unit
US5838525A (en) * 1997-04-15 1998-11-17 Abb Power T&D Company, Inc. High speed single-pole trip logic for use in protective relaying
GB2388482B (en) * 2002-05-07 2005-06-15 Alstom Improved power line protection
MX2014003271A (en) 2011-10-12 2014-04-10 Schweitzer Engineering Lab Inc Fault location using traveling waves.
US8990036B1 (en) 2013-09-16 2015-03-24 Schweitzer Engineering Laboratories, Inc. Power line parameter adjustment and fault location using traveling waves
US9588168B2 (en) 2013-09-16 2017-03-07 Schweitzer Engineering Laboratories, Inc. Fault location using traveling waves
US9594112B2 (en) 2014-09-16 2017-03-14 Schweitzer Engineering Laboratories, Inc. Fault detection in electric power delivery systems using underreach, directional, and traveling wave elements
US9509399B2 (en) 2015-02-13 2016-11-29 Schweitzer Engineering Laboratories, Inc. Transmission line protection using traveling waves in optical ground wire fiber
US10090664B2 (en) 2015-09-18 2018-10-02 Schweitzer Engineering Laboratories, Inc. Time-domain directional line protection of electric power delivery systems
CN110932246A (en) 2015-09-18 2020-03-27 施瓦哲工程实验有限公司 Time domain line protection for power transmission systems
EP3363095A4 (en) 2015-10-12 2019-08-14 Schweitzer Engineering Laboratories, Inc. Traveling wave directional element
US10564247B2 (en) 2015-10-13 2020-02-18 Schweitzer Engineering Laboratories, Inc. Testing system for traveling wave fault detectors
CN108139438B (en) 2015-10-13 2021-03-12 施瓦哲工程实验有限公司 Power system monitoring using high frequency signals
EP3363087A4 (en) 2015-10-13 2019-06-26 Schweitzer Engineering Laboratories, Inc. Testing system for traveling wave fault detectors
EP3362807A4 (en) 2015-10-14 2019-06-26 Schweitzer Engineering Laboratories, Inc. High-frequency electric power system signal processing system
CN109154630B (en) 2016-06-13 2021-01-29 施瓦哲工程实验有限公司 Overcurrent element in time domain
EP3469674A1 (en) 2016-06-14 2019-04-17 Schweitzer Engineering Laboratories, Inc. Phase selection for traveling wave fault detection systems
US10236675B2 (en) 2016-07-26 2019-03-19 Schweitzer Engineering Laboratories, Inc. Fault detection and protection during steady state using traveling waves
US10585133B2 (en) 2016-11-11 2020-03-10 Schweitzer Engineering Laboratories, Inc. Electric power fault protection device using single-ended traveling wave fault location estimation
US10295585B2 (en) 2016-11-11 2019-05-21 Schweitzer Engineering Laboratories, Inc. Traveling wave based single end fault location
US11280834B2 (en) 2018-08-30 2022-03-22 Schweitzer Engineering Laboratories, Inc. Detection of low-energy events in an electric power system
US10677834B2 (en) 2018-09-14 2020-06-09 Schweitzer Engineering Laboratories, Inc. Distance protection of electric power delivery systems using time domain and frequency domain
US10641815B2 (en) 2018-09-27 2020-05-05 Schweitzer Engineering Laboratories, Inc. Secure distance protection of electric power delivery systems under transient conditions
US11067617B2 (en) 2018-10-08 2021-07-20 Schweitzer Engineering Laboratories, Inc. Single-end traveling wave fault location using line-mounted device
US11592498B2 (en) 2020-10-02 2023-02-28 Schweitzer Engineering Laboratories, Inc. Multi-phase fault identification in capacitor banks
US11735907B2 (en) 2021-02-03 2023-08-22 Schweitzer Engineering Laboratories, Inc. Traveling wave overcurrent protection for electric power delivery systems
US11808824B2 (en) 2021-03-17 2023-11-07 Schweitzer Engineering Laboratories, Inc. Systems and methods to identify open phases of a capacitor bank

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB654913A (en) * 1947-11-28 1951-07-04 Westinghouse Electric Int Co Improvements in or relating to protective relaying systems
SE368092B (en) * 1972-11-06 1974-06-17 Asea Ab
SE373239B (en) * 1973-05-21 1975-01-27 Asea Ab
CH559449A5 (en) * 1973-05-30 1975-02-28 Bbc Brown Boveri & Cie
SE375886B (en) * 1973-08-22 1975-04-28 Asea Ab
DE2405908B1 (en) * 1974-02-07 1975-06-05 Siemens Ag Control circuit for a main contactor
SE387019B (en) * 1974-11-21 1976-08-23 Asea Ab PROTECTION OF INSTALLATION INSTALLATIONS IN ELECTRIC POWER NETWORK
GB1570491A (en) * 1975-11-14 1980-07-02 Gen Electric Co Ltd Protective relay arrangements

Also Published As

Publication number Publication date
FR2410386B1 (en) 1983-12-02
CA1117585A (en) 1982-02-02
CH641917A5 (en) 1984-03-15
DE2850412A1 (en) 1979-05-31
IT1160971B (en) 1987-03-11
US4254444A (en) 1981-03-03
FR2410386A1 (en) 1979-06-22
SE409153B (en) 1979-07-30
SE7713409L (en) 1979-05-29
GB2011740A (en) 1979-07-11
GB2011740B (en) 1982-09-02

Similar Documents

Publication Publication Date Title
IT7869708A0 (en) RELAY PROTECTION DEVICE WITH THREE-PHASE RELEASE DUE TO UNDERVOLTAGE
GB2020124B (en) Overcurrent protection
SE7700514L (en) OVERLOAD PROTECTION FOR ELEVATORS
IT1125623B (en) PROTECTION RELAY
SE7801566L (en) OVERLOAD PROTECTION DEVICE
JPS54154175A (en) Clrcuit breaker device
SE7907706L (en) PROPELLER PROTECTION DEVICE
IT1125624B (en) PROTECTION RELAY
GB2033177B (en) Circuit breaker with undervoltage release
JPS52104650A (en) Protective device for preventing damage to flywheel
ATA350877A (en) OVERLOAD PROTECTION CIRCUIT FOR A SPEAKER SYSTEM
SE7900254L (en) PROTECTIVE RELAY DEVICE
SE7803326L (en) BRAKE LOAD PROTECTION DEVICE
DK154526C (en) CONNECTION WITH OVERLOAD PROTECTION
IT1088468B (en) MECHANICAL CONNECTION DEVICE SIGNABLE TO OVERLOAD
JPS558274A (en) Overload protecting device
GB2004144B (en) Over-current protection arrangements
JPS5549914A (en) Overcurrent protecting device
DD148154A3 (en) OVERLOAD PROTECTION FOR HOISTS
BR8004394A (en) A BREAKER'S MANEUVERING DEVICE
SE7806140L (en) BRAKE LOAD PROTECTION DEVICE
DD131331A1 (en) OVERLOAD PROTECTION FOR RODERAEDER
SE7813247L (en) DEVICE AT A BARMARK SKI
AT346031B (en) OVERLOAD PROTECTION FOR LIFTING EQUIPMENT
SE7807011L (en) SASOM OVERLOAD PROTECTION APPLICABLE WITH BIMETEEL ELEMENTS EQUIPPED THERMOSTROM SWITCH